Timing apparatus for photographers



2 sheetsfsheet 1.

(No Model.)

H. FORD. TIMING APPARATUS POR PHOTOGRAPHERS.

No. 423,473. Patented Mar. 18, 1890.

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(No Modell) 2 S11eets-Shmi; 2. I H. FORD. TIMINGAPPAR'ATUS PORPHOTOGRAPHERS. No. 423,473. Patented Mar. 18, 1890.

if :f Y@ G UNITED STATE-s PATENT OFFICE.

HARRY FORD, OF LYNDON, KANSAS.

TIMING APPARATUS FOR PHOTOGRAPHERS.

SPECIFICATION forming part of Letters Patent No. 423,473, dated March18, 1890.

Application filed May 29, 1889. Serial No. 312,526. (No model.)

To a/ZZ whom it may concern:

Be it known that l, HARRY FORD, a citizen of the United States, residingat Lyndon, in the county of Osage and State of Kansas, have invented anew and useful Timing Apparatus for Photographers, of which the folllowing is a specification.

This invention has relation to print-timing apparatuses for photographs.

Among the objects in view are to provide an apparatus having a series ofpreferably five or more concentric perforations, the perforations beingsuitably numbered and representingone or more minutes, to provide a casewith suitable clock mechanism, having an alarm and an indicator movingover the dial, and a series of pins corresponding by numbers to thespaces occupied by the printing-frames while printing, whereby said pinsrepresenting their respective spaces may be inserted in one of theperforations a suitable number of minutes in advance of thedialindicator, and when said dial-indicator or hand reaches that pointan alarm will be sounded, and thus indicate that the frame correspondingin number with that pin requires attention.

Other objects and advantages of the in- Vention will hereinafter appear,and the novel features thereof will be particularly pointed out in theclaims. n

Referring to the drawings, Figure 1 is a plan of an indicatorconstructed in accordance with my invention. Fig. 2 is a similar View,the dial removed, and Fig. 3 is a plan of a printing-frame provided withcertain adjuncts; Fig. 4, a printing-frame holder adapted to receive aseries of frames. Fig. 5 is atransverse central section.

Like numerals of reference indicate like parts in all the figures of thedrawings.

1 represents a suitable casing, in which at its center` is located anyordinary clock mechanism 2, the minute-shaft of which is provided with aclosely-fitting alarm-bell 3, and with an arm ixedly mounted with theshaft and designated as 4, one end of the arm being bent to form an L,as at 5, and provided with a pintle 6, around which is wound a coiledspring 7, and from one side of which projects a hammer S, adapted tostrike the bell, and

from the other side an outwardly-projecting trip 9. The mechanism iswound after the manner of an ordinary clock, and by the insertion of akey through the bottom of the casing which takes over the winding-shaft.

10 represents the cover of the casing, which in this instanceconstitutes a dial,- and the same is secured by an y suitable means-inthis instance by screws 12-to the walls of the easing. A series ofopenings or perfor-ations 13 are arranged 'at right angles to eachother-in this instance at the four corners of the cover and are numberedfrom 1 up to any desired number, and serve to receive when not in use anumber of pins 11, having heads 13, bearing numerals corresponding withthose of the perforations 13. A central opening 14 is formed in thecover 10, and up through the same projects the minute post or shaft ofthe clock mechanism, and upon the same is arranged a minute hand orindicator 15, the same being almost in line with the arm 5, arrangedupon the shaft below the casing. A series of-iu this instanceiive-concentrically-arranged openings orpcrforations 16 are formed inthe cover 10, one of said series being provided with numerals from 1 toGO, and representing minutes, or it may be two or more, as desired. Theperforations, while formed upon circles, are concentric with the opening14, and. are also upon radiating lines from said opening 14, so that agiven numeral will indicate a radial series of openings or perforations.ln order to emit the sound from the casing, the same is preferably profvided with one or more openings 17 in its side walls.

The above description applies to the indicater proper, which indicatoris designed for use in connection with certain other ad juncts, which Iwill now proceed to describe.

Referring to Fig. 3, A represen-ts an ordinary print-ing window or rack,and C represents an ordinary printing-frame, upon any suitable point ofwhich is mounted an indicator D, divided into degrees by a numberedscale E from 1 to 10, and then 12, 15, 18,21, &c., each degree beingprovided with numerals from 1 to 60, as represented, or it may beotherwise, if desired.

A hand-indicator F is provided upon the l'OO dial B and adapted to bemoved over said dial.

The operation of my invention is as follows: t is well known amongphotographers and others skilled in the art to which my inventionrelates that considerable loss of time accrues from the necessaryceaseless examining of the prints in order that they may not be over orunder printed. It is also well known that different negatives requiredifferent lengths of exposure in the same sun, and that the dilferentlights give different results to the same negative when exposed the samelength of time. By my invention, however, I propose to determine thelength of time a certain negative will take to print in the light towhich itis to be exposed, and afterascertaining that fact the time forremoval of that print will be indicated by an alarm previously set, thusavoiding any necessity for watching the time and frequent examinationsof the print. I also propose to so manipulate or print a series ofnegatives at one and the same time. I take, for instance, the frame Cand placeit on the space designated as l in the printing window or rackB, (having judged the time it will take to print by looking at thenegative and observing the strength of the printing-light at the time.)I then take the pin designated as l,which corresponds with the saidspace, and insert the same a sufficient number of holes or perforationsahead of the indicating-hand 15 as will indicate the minutes supposed tobe required to finish the print. In the same way do I till all of thespaces with frames, having guessed in the same manner the length of timeeach negative takes in the light at hand. When the indicating-hand l5arrives at the pin I, the tripping-arm 5 and its trip 9 will be broughtin contact with the pin I and the alarm sounded. The first frame is thenremoved and the print examined, and, if done, removed therefrom andfresh sensitized paper placed with the frame ready for another print andthe pin l moved the same number of spaces ahead as before. If onexamination the print should be found to be not suflieiently printed,the frame is again placed out and the pin l advanced a sutiicient numberof minutes to complete the prin t, and the indicator-hand on the dial Dalso advanced a like number of minutes. Ateach successive alarm theframe corresponding to the pin pointed to by the hand on the dial l0 isexamined and treated accordingly. The dial D serves the purpose ofindicating the number of minutes it has taken to suiiiciently print froma negative contained within that frame, so that the operator will notbecome confused when printing a number of negatives, but by reference tothe dial can see just how many degrees ahead of the indicating-hand l5he must insert the corresponding pin.

I do not wishto limit myself to the precise construction of form of theparts illustrated,

and I reserve the right to modify my invention within the spirit andscope of the claims.

Having described my invention, what I claim isl. The combination, withacasinghavinga dial provided with five or more concentrically andradially arranged series of perforations indicating minutes, and aAseries of removable pins adapted for insertion in the perforations andto depend in one of the series of perforations below the dial, of aclock mechanism mounted in the casing and provided with an alarm adaptedto be operated by the pins, and with a minute-shaft passing through thedial and provided with a pointer adapted to move over said dial,substantially as specified.

The combination, in an indicator, of a casingprovided with a coverhaving several series of concentric radially-arranged perforations,removable pin mounted in the perforations in one of said series anddependingr below the bottom surface of the cover, of clock mechanismmounted in the casing, the minute-shaft of which is provided with analarm-bell and with a dial-hand extending over the dial on the cover, anintermediate cross-shaft or arm provided with a hammer, and a trip-armadapted to be brought into contact with the pins, substantially asspecified.

3. The combination, with a casing having a cover provided with severalseries of concentrically and radially arranged perforations spaced apartto indicate degrees of time, and a series of pins adapted for insertionwithin the perforations, of a clock mechanism mounted in the casing, theminute-post of which is provided with a bell and a horizontally-arrangedalarm-soundin g bar terminating in an L-shapcd end having bearings, aspring actuated hammer mounted in the bearings and having a trip, and anindicator, and mounted on the shaft and nearly in line with the bar,substantially as specified.

at. An indicator having a dial provided with perforations representingdegrees of time, and pins bearing numbers adapted for insertion withinthe perforations and depending into the casing, a clock mechanismmounted in' the casing and having an alarm-bell, a trip and hammeradapted to operate the bell mounted on the minute-post of the mechanism,said apparatus being adapted for use in connection with a printing-frameholder, having numbers agreeing with those on the pins, andprinting-frames having indicators mounted thereon and divided intodegrees of time, agreeing with those of the dial, substantially asspecified.

5. The ease 1, having the cover l0 secured thereon by the screws 12 andprovided with the central perforation It, the concentric and radiallyarranged series of perforations 1G, representing the degrees of time,and having the outer series of perforations 18, in combination with theclock mechanism 2, mounted ICO ITO

in the casing having the minute-shaft 4, the bell 3, the arm 5,terminating in van L, and

. having the pint-1e 6, spring 7, hammer 8, and

trip 9, adapted to be actuated by the pins, and having the pointer 15projecting above and adapted to move over the dial-cover 10,substantially as specified. Y

(i. The combination, with an ordinary clocktrain, of an alarm-bell, aminute-hand armed with a trip-acting hammer for striking said bell,set-pins for operating said trip, and a perforated dial for placingsaid'pins at various distances in advance of a minute-hand, for thepurpose of tiini g photographic prints, inthe manner as substantiallyset forth.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

- HARRY FORD.

Witnesses: l A L L. T. WILSON, l g WALTER PLEASANT.

